Hi,

I have spend hours trying to find info, but am out of ideas.
I have bought an i3 MK3 clone called P802QR2 (product data) a long time ago.
The board was never working properly, so a couple of years ago i bought a new board "EinsyRambo 1.1a Mainboard For Reprap Prusa i3 MK3 With 4 TMC2130 SPI 4 Mosfet + 2004 LCD Display +3D Printer z-probe Touch"

I have now gotten back into it and followed this tutorial to build my own version of the firmware, currently 3.9.2-3524

The problem I now have is that the wizard fails when checking the X axis with "Axis length, Axis X".
I have been playing around with it, but just cannot get it sorted our. Nothing is touching, everything is clean and lubricated and running smooth.

would be great if someone could help me out.

Quote
Printer data:
P802QR2 printer
Linear bearing - SCS8UU
Pulley - 2GT 20 teeth
Lead rod - 8mm
Belt - 2GT - 2mm pitch
TMC2130 SPI 4 Mosfet - 16 micro steps

Quote
// Printer revision
#define PRINTER_TYPE PRINTER_MK3
#define PRINTER_NAME PRINTER_MK3_NAME
#define PRINTER_MMU_TYPE PRINTER_MK3_MMU2
#define PRINTER_MMU_NAME PRINTER_MK3_MMU2_NAME
#define FILAMENT_SIZE "1_75mm_MK3"
#define NOZZLE_TYPE "E3Dv6full"

// Developer flag
#define DEVELOPER

// Printer name
#define CUSTOM_MENDEL_NAME "Prusa i3 MK3"

// Electronics
#define MOTHERBOARD BOARD_EINSY_1_0a
#define STEEL_SHEET
#define HAS_SECOND_SERIAL_PORT


// Uncomment the below for the E3D PT100 temperature sensor (with or without PT100 Amplifier)
//#define E3D_PT100_EXTRUDER_WITH_AMP
//#define E3D_PT100_EXTRUDER_NO_AMP
//#define E3D_PT100_BED_WITH_AMP
//#define E3D_PT100_BED_NO_AMP


/*------------------------------------
AXIS SETTINGS
*------------------------------------*/

// Steps per unit {X,Y,Z,E}
//#define DEFAULT_AXIS_STEPS_PER_UNIT {100,100,3200/8,140}
#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,3200/8,140}

Edited 1 time(s). Last edit at 01/01/2021 11:01PM by 366Cobra.

I just noticed that my belt tension is totally off. Can that be the cause?

It is supposed to be 240-300.
I have tried with a lot of tension and not so much tension on mine and the values are from 81 - 104.

If it does affect the result of self-test, can this be disabled in the firmware?
If so, what would I need to comment out?